Rieger, T. [P:(DE-Juel1)141766] ; Lepsa, M.I. [P:(DE-Juel1)VDB98883] ; Schäpers, Th. [P:(DE-Juel1)128634] ; Lüth, H. [P:(DE-Juel1)VDB975] ; Grützmacher, D. [P:(DE-Juel1)125588]